Fig. 3. Growth of Listeria innocua (MPN) during storage of cold smoked salmon at
5.5 C. Cold smoked salmon had been treated with 900 MPa for for 10 (-,-), 20 (--),
30 (-A-) and 60 (---)s. Samples not treated with HPP used as control (unspiked->-,
spiked-:-). Mean of two samples (mean SD). Listeria concentration before pressure
was 4.5 103 cfu/g.